Specifics of the Gazetteer

Overview

Coordinates listed in columns labeled "lat" and "long" are taken from the maps identified in columns "quad" and "map," or from digital images. Note that coordinates of features are updated from time to time as new control networks and image mosaics become available. For maps published by the USGS the field "quad" identifies the informal name of the map, and the field "map" lists the USGS map identification ("I" or "SIM") number. In identifying lunar maps published by the DMA or ACIC in the 1960s and early 1970s or Soviet maps of Venus published in 1985 and 1986, we use different systems of identification, as shown in the key below.

Names shown in gray type and in brackets are not currently in use. These names have either been dropped or were never officially approved. Dropped names have an approval status of 6, and names that were never officially approved have an approval status of 7.

Column Classification and Codes

Label

Description

Target

Planet or Satellite where the name is found.

Feature Name

As spelled by honoree or by reference shown in Sources of Planetary Names; brackets indicate that the name has been dropped or was never officially approved. This field shows the names with the diacritical marks.

Clean Feature Name

This field shows the feature name without the diacritical marks which can cause display issues in some programs. The correct spelling of a feature name includes diacritical marks not shown in this field.

Center Latitude

Latitude of center of feature. Positive numbers indicate that the feature is located in the northern hemisphere, and negative numbers indicate that the feature is located in the southern hemisphere.

Center Longitude

Longitude of center of feature. Degrees 0 to 360 in an east or west system. On the Moon, positive longitude values indicate east longitudes, and negative values indicate west longitudes.

Northern Latitude

Northernmost latitude of feature. Positive numbers indicate that the feature is located in the northern hemisphere, and negative numbers indicate that the feature is located in the southern hemisphere.

Southern Latitude

Southernmost latitude of feature. Positive numbers indicate that the feature is located in the northern hemisphere, and negative numbers indicate that the feature is located in the southern hemisphere.

Eastern Longitude

Easternmost longitude of feature. Degrees 0 to 360 in an east or west system. On the Moon, positive longitude values indicate east longitudes, and negative values indicate west longitudes.

Western Longitude

Westernmost longitude of feature. Degrees 0 to 360 in an east or west system. On the Moon, positive longitude values indicate east longitudes, and negative values indicate west longitudes.